Compressive Behavior of Bamboo Sheet Twining Tube-Confined Concrete Columns

Abstract

This study experimentally investigated various axial compressive parameters of a new type of confined concrete, which is termed bamboo sheet twining tube-confined concrete (BSTCC). This new composite structure was composed of an outer bamboo composite tube (BCT) jacket and a concrete core. Under axial compression, the parameters of thirty-six specimens include concrete strength (i.e., C30 and C50) and BCT thickness (i.e., 6, 12, 18, 24, and 30 layers). The mechanical properties of the BSTCC specimens from the perspective of the failure mode, stress-strain relationship, effect of BCT thickness and dilation behavior were analyzed. The results showed that, in compression, with an increase in BCT thickness in the range of 18-layers of bamboo sheets, the strength increased remarkably. When the strength of the concrete core was high, the confinement effect of the BCT was reduced. In addition, the BCT thickness relieved the dilation of the BSTCC specimens. Finally, the experimental results were compared with predictions obtained from 7 existing FRP-confined concrete models. All the predictions had good agreement with the test results, which further confirmed that the models developed for FRP-confined concrete can provide an acceptable approximation of the ultimate strength of the BSTCC specimens.

Effect of temperature on compressive mechanical properties and strength design index of reconstituted bamboo

“…To investigate the effect of environmental temperature on the mechanical properties of reconstituted bamboo, the humidity was set to 50% (constant), and the compressive specimens were divided into five groups by different temperature levels (10,20,30,50, and 70 C). Three compression specimens of the same size were chosen for the parallel test to assure the reliability of the mechanical property test data of reconstituted bamboo; a total of 15 specimens were tested.…”

“…The standard value of compressive strength (f k ) of reconstituted bamboo was obtained by substituting the average strength (σ av-cu ) and standard deviation (SD σ ) of reconstituted bamboo in Table 1 into Equation (10). The modified coefficient and standard value of compressive strength (f k ) in Table 4 were substituted into Equations (11), (12), and (13).…”

“…Compared with other biomass materials, such as timber, bamboo has green, low-carbon, energy-saving, ecological, and environmental protection characteristics 1 and has excellent mechanical properties of fiber-reinforced polymers. [2][3][4][5][6] In recent years, studies have indicated that bamboo engineering materials are suitable not only for decoration and furniture but also for building structures [7][8][9][10][11] and have been generally utilized in pedestrian bridges, residential buildings, and landscape buildings. [12][13][14][15] In bamboo engineering materials, reconstituted bamboo has excellent mechanical properties, [16][17][18] which is a research hotspot for new biomass engineering materials.…”

Mechanical Behavior of Foam-Filled Bamboo Composite Tubes under Axial Compression

“…In addition, the combination of bamboo with other materials can achieve better performance [ 37 , 38 , 39 , 40 , 41 , 42 , 43 ]. In recent years, there has been some research on bamboo fiber tube confined concrete [ 44 , 45 , 46 ], but none of these studies involved foam-filled bamboo composite tubes.…”

A Review of Fibre Reinforced Polymer (FRP) Reinforced Concrete Composite Column Members Modelling and Analysis Techniques

“…The environmental friendliness of building materials [1][2][3][4][5] is crucial to the construction sector's transition to sustainable development. Multiple review articles have been published those deals with using different materials and methods to enhance the concrete strength and represent the economic and environmental benefits [6][7][8][9][10].…”